Dynamo eleoteio machine



(No Model.) 4 Sheets-Sheet 1. E. T. GILLILAND. DYNAMO ELECTRIC MACHINE.

No. 461,240. Patented Oct. 13,1891.

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' ATTORNEY.

(No Model.) 4 SheetsSheet 2.

E. T. GILLILAND.

DYNAMO ELEGTRIG MACHINE.

No. 461,240.. Patented Oct. 13, 1891.

INVENTOI? WITNESSES .7 620 6 M 61; a/gw 1 5 (No Model.) I4Sheets-Sheet-3.

E. T. GILLILAND. I

DYNAMO ELECTRIC MACHINE.

No. 461,240. Patented Oct. 13, 1891.

ATTORNEY.

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4 Sheets-Sheet 4.

(No Model.)

B. T. GILLILAND. DYNAMO ELECTRIC MACHINE.

N0. 461,Z40. Patented Oct. 13, 1891.

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WITNESSES:

' UNITED STATES PATENT OFFICE.

EZRA T. GILIJLAND, OF NEIV YORK, Y.

DYNAMO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 461,240, dated October13, 1891.

Application filed January 31, 1391. Serial No, 379,850. (No model.)

To coZZ whom it may concern.-

Be it known that I, EZRA T. GILLILAND, a citizen of the United States ofAmerica, residing at the city of New York, county of New York, State ofNew York, have invented certain new and useful Improvements inDynamoElectric Machines, of which the following is a specification.

My invention consists in an improved frame of a dynamo-electric machineand in an improved provision for assembling the parts within the frame.

In constructing dynamos and motors great difiiculty is encountered incentering the journal-bearings for the armature upon the axis of thepolar cavity or cylindrical space between the faces of the pole-pieces,within which the armature is revolved. In machines in which the supportsfor the journal-bearings are mounted upon the base of the machine andfastened to it .by bolts a slight imperfectione. 9., in the bolt or itsthread will destroy the centering of the journalbearing, either bymoving the support aside or by turning it upon its base. To avoid this,dowel-pins are commonly inserted in the sup ports and base; but, howeverit may be accomplished, it is always a diiiicult matter to centersupports erected upon the base, and they are liable to disarrangement,and this is true of any support the centering of which depends upon theset of a screw in its bed.

It is the object of my invention to simplify and cheapen the manufactureof dynamos and other machines of the same general class by removing thisditliculty, and at the same time I secure other advantages hereinafterpointed out. I accomplish this by casting the field-magnets and thesupporting-arms for the journal-bearings for the armature all in onepiece of iron and in such manner as to permit the boring necessary tofinish the machine ready for assembling to be done at one operation, andalso to provide for the insertion of the armature and the coils of thefieldmagnets into position in the frame. llaving cast the field-magnetsand the supports for the journal-bearings as a single piece,orhavingcast the whole frame, including these parts, as a single piece, I boreat one operation, by well-known methods, the supports and the faces ofthe field-magnets upon a common center, by which is meant that thecenters of r the orifices in the arms and of the curved faces of thefield-pieces all lie along a com mon axis, which is the axis of rotationof the armature, as described below, reference being had to theaccompanying drawings, in which- Figure 1 is a top view of the frame.Fig. 2 is a view from the end through which the coils and armature areintroduced into position. Fig. 3 is alongitudinal section on the line aa of Fig. 1. Fig. 4 is partly a longitudinal section and partly anelevation of the end shown in Fig. 2. Figs. 5 and 6 are details of thecylinder-head; Figs. 7, S, and 9,

the rocker-arm, which supports the commu-.

tator-brushes; Figs. 10 and 1].,a1nodifieation.

Referring to Figs. 1 to 0, A is the frame of the machine. I3 is the armor support forajournal-bearing through which the field-magnet coils andthe armature are introduced into position. C is the arm or support for ajournal-bearing at the other end of the machine. D is the pole andpole-piece of one of the fieldmagnets.

I11 constructing the machine the arm 0 is bored of proper size toreceive a journal-bearing. The arm Bis bored with an opening or orificelarger than the external diameter of the armature or otherwise shaped toadmit the armature into the polar cavity. 111 practice the orifice ismade circular an d of equal diameter with the polar cavity. To permitthe introduction of the coils of the field-magnets, which are wound uponbobbins, a section of the rim about this orifice is cut away either atthe top or the bottom, or both, (see Fig. 11,) thus forming an openingthrough the arm, and the base, or if desired, the top of the frame iscut away, as shown at F.

\Vhen the machine is to be assembled, the coils of the field-magnets areinserted through the end B and slipped onto the cores. The armature isthen inserted through the circular orifice in 13. One end of its axis issupported in the bearing in the arm 0. The other end is supported in aplate or other support, which can be fitted into the orifice as thejournal-bearing in the cylinder-head G. (Illustrated in Figs. 4, 5, and6.) Both the journal-bearings of the armature-axis are of non magneticmaterial. On the cylinderhead is cut a flange H, which fits accuratelyarm B.

within the orifice in B. This cylinder-head is bored, turned off, andfaced at one operation, and is thereby accurately centered and aligned.The head is fastened to the arm by bolts inserted through the holes J.As the rim of the cylinder-head fits snugly against the outer face ofthe arm B, no defect in the screws can effect more than a slightrotation of the cylinder-head, and since the journalbearing is at thecenter of the cylinder-head the centering or alignment is not destroyedthereby. Thus the centering of the journalbearing is secured by theabutment of its support'nam ely, the flanged cylinder-headagainsttheinner walls and outer face of the Within the cylinder-head is the oilwell and feed K. (Shown in Figs. 5 and 6.)

'Iherocker-arm L of the commutator (illustrated in Figs. 8 and 9) has aflange m, similar to II, and which is inserted into the same orifice,but from the rear of the arm B. This rocker-arm is cut away at Oto slipover the axis of the armature. In the flange m is a notch or groove 01,extending around the whole or a part of its circumference, in whichplays a set-screw P. This screw prevents lateral movement of therocker-arm while it is being rotated and locks the arm in any desiredposition.

By extending the supports for the armature from the field-magnet,instead of resting them upon the base, it becomes possible to reduce thesize of the base, and hence the weight of the frame, and these supportshelp to hold the pole-piece of the field-magnets against the enormousattraction tending to draw them together. Moreover, since the supportsconnect the pole-pieces through the cores of the field-magnets they arein the magnetic circuit.

In the modification shown in Figs. 10 and 11, in which the arm B is cutin two by the openings E E, itis necessary, in order to secure the fulladvantage of introducing the supports into the magnetic circuit, to makethe cylinder-head of magnetic material. The head used With eitherform isordinarily made of cast-iron. The cut in thebase of the frame (shown atF) is not necessary in this modification.

It is obvious that each of the arms B and C may be bored with an orificelarge enough to admit the armature. Both journal-bearings may in thatcase be supported in cylinder-heads. \Vhere in the claims I specify thatone arm is bored to admit the armaturebearing I do not limit myself toso boring one of the arms only. It is also obvious that my invention isapplicable to motors as well as dynamos, and the claims are intended tocover its application to the general class of dynamo-electric machinery.

What I claim, and desire to secure by Letters Patent, is

1. In a dynamo, the field-magnets and supports for the armature-axisbored upon a common center, the boring in one support being a circularopening to admit the armature into the polar cavity, in combination witha support fitting into the opening and having at its center a bearingfor the axis of the armature, substantially as described.

2. In a dynamo, the field-magnets and supports for thearmature-axis madein one piece and bored upon a common center,,the boring in one supportbeing a circular opening to admit the armature into the polar cavity, incombination with a support fitting into the opening and having at itscenter a bearing for the axis of the armature, substantially asdescribed.

In a dynamo, the field-magnets and supports for the armature-axis,whichconnect the pole-pieces magnetically through their cores, all bored upona common center, the boring in one support being a circular opening toadmit the armature into the polar cavity, in combination with a supportfitting into the opening and having at its center abearing for the axisof the armature, substantially as described.

4. In a dynamo, the field-magnets and supports for the armature-axis,which connect the pole-pieces magnetically through their cores, made allin one piece and bored upon a common center, the boring in one supportbeing a circular opening to admit the armature into the polar cavity, incombination with a support fitting into the opening and having at itscenter a bearing for the axis of the armature, substantially asdescribed.

5. In a dynamo, the field-magnets and supports for the armature-axisbored upon acommon center, the boring in one support being a circularopening to admit the armature into thepolar cavity, in combination witha flanged cylinder-head fitting into the opening and against the face ofthe support and having at its center a bearing for the axis of thearmature, substantially as described.

6. In a dynamo, the field-magnets and supports for the armature-axismade in one piece and bored upon a common center, the boring in onesupport being a circular opening to admit the armature into the polarcavity, in combination with a flanged cylinder-head fitting into theopening and against the face of the support and having at its center abearing for the axis of the armature, substantially as described.

7 In a dynamo, the field-magnets and supports for the armature-axis,which connect the pole-pieces magnetically through their cores, allbored upon a common center, the boring in one support being acircularopening to admit the armature into the polar cavity, in combination witha flanged cylinder-headfitting into the opening and against the face ofthe support and having at its center a bearing for the axis of thearmature, substantially as described.

8. In a dynamo, the field-n1agnets and sup ports for the armature-axis,which connect the pole-pieces magnetically through theircores,

IIO

made all in one piece and bored upon a common center, the boring in onesupport being a circularopeningto admit the armature into the polarcavity, in combination witha flanged cylinder-head fitting into theopening and against the face of the support and having at its center abearing for the axis of the armature, substantially as described.

9. In a dynamo, the field-magnets and supports for the armature boredupon a common 'center, the boring in one support being a circularopening to admit the armature into the polar cavity and having the rimcut away, as shown at E, to provide for assembling the parts of themachine, in combination with a support fitting into the opening andhaving at its center a bearing for the axis of the armature,substantially as described.

10. In a dynamo, the field-magnets and supports for the armature boredupon a common center, one support being cut in two to provide forassembling the parts of the machine and having faces that form arcs of acommon circle, in combination with a support abutting against the facesand having at its middle point a bearing for the axis of the armature,sustained at the common center by the abutment of the support againstthe faces, substantially as described.

11. In a dynamo, the field-magnets and supports for the armature, whichconnect the pole-pieces magnetically through their cores, all bored upona common center, one support being cut in two to provide for assemblingthe parts of the machine and having faces that form the arcs of a commoncircle, in com-' bination with a support of magnetic material abuttingagainst the faces and having at its middle point a bearing for the axisof the armature, sustained at the common center by the abutment of thesupport against the faces, substantially as described.

12. In a dynamo, the field-magnets and supports for the armature, onesupport having an opening large enough to admit the armature into thepolar cavity, in combination with a rocker-arm carrying thecommutatorbrushes sustained by said support, and a support for ajournal-bearing fitting into said opening, substantially as described.

13. In a dynamo, the field-magnets and supports for the armature, onesupport having an opening large enough to admit the armature into thepolar cavity, in combination with a support for a journal-bearing, and arocker-arm carrying comxnutator-brushes, both fitting into said opening,substantially as described.

14. In a dynamo, the field-magnets andsupports for the armature, onesupport having an opening large enough to admit the armature into thepolar cavity, in combination with a support for a journal-bearing, and aflanged rocker-arm carrying commutatorbrushes, both fitting into theopening, and a set-screw to fasten the rocker-arm, substantially asdescribed.

15. In a dynamo, the field-magnets and supports for the armature, onesupport having an opening large enough to admit the arma- 7o ture intothe polar cavity, in combination with a support for a j ournalbearing,and a flanged rocker-arm carrying commutator -brushes, both fitting intothe opening, the flange of the rocker-arm having a groove in which playsa set-screw, substantially as described.

EZRA T. GILLILAND.

Witnesses:

CHARLES P. BRUCH, EMMA L. WYMAN.

